Rewrite the clean steps for TARGET_2ND_ARCH.

Convert clean rules from TARGET_ARCH to TARGET_2ND_ARCH and vice versa.

Change-Id: I5711b38cd834272d26d78e5cf847e97f27139c5b
diff --git a/core/cleanbuild.mk b/core/cleanbuild.mk
index 46a312a..8731457 100644
--- a/core/cleanbuild.mk
+++ b/core/cleanbuild.mk
@@ -81,6 +81,28 @@
     $(info Clean step: $(INTERNAL_CLEAN_STEP.$(step))) \
     $(shell $(INTERNAL_CLEAN_STEP.$(step))) \
    )
+
+  # Rewrite the clean step for the second arch.
+  ifdef TARGET_2ND_ARCH
+  # $(1): the clean step cmd
+  # $(2): the prefix to search for
+  # $(3): the prefix to replace with
+  define -cs-rewrite-cleanstep
+  $(if $(filter $(2)/%,$(1)),\
+    $(eval _crs_new_cmd := $(patsubst $(2)/%,$(3)/%,$(1)))\
+    $(info Clean step: $(_crs_new_cmd))\
+    $(shell $(_crs_new_cmd)))
+  endef
+  $(foreach step,$(steps), \
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$(TARGET_OUT_INTERMEDIATES),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$(TARGET_OUT_SHARED_LIBRARIES),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_SHARED_LIBRARIES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$(TARGET_OUT_VENDOR_SHARED_LIBRARIES),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_VENDOR_SHARED_LIBRARIES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_INTERMEDIATES),$(TARGET_OUT_INTERMEDIATES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_SHARED_LIBRARIES),$(TARGET_OUT_SHARED_LIBRARIES))\
+    $(call -cs-rewrite-cleanstep,$(INTERNAL_CLEAN_STEP.$(step)),$($(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_VENDOR_SHARED_LIBRARIES),$(TARGET_OUT_VENDOR_SHARED_LIBRARIES))\
+    )
+  endif
+  _crs_new_cmd :=
   steps :=
 endif
 CURRENT_CLEAN_BUILD_VERSION :=